Fact is that the response to Concorde by the US was bound to be infuenced by its 'foreign' build and the need by Boeing and others to constrain competition.
All the nonsense about noise of operations would have been swept aside if the US flag was slapped on the side.
The withdrawal of Concorde from service without a supersonic replacement will leave a massive void for travellers and manufacturers. It is a testament to the Concorde development teams that they solved the design issues at a time when it took real skill and engineering talent to produce a conventional airplane, never mind a craft that is still world beating after all these years.
Goodbye sweet bird, farewell sweet Concorde!
The goal of Computer Science is to build something that will last at least until we've finished building it.